(function() {
+'use strict';
/**
* Version of this script. If the server returns a version larger than
* @type {Number}
* @const
* @private */
-var SCRIPT_VERSION = 2021021300;
+let SCRIPT_VERSION = 2021021300;
/**
* The current backend URL.
* @type {!string}
* @private
*/
-var backend_url = "/analysis.pl";
-var backend_hash_url = "/hash";
+let backend_url = "/analysis.pl";
+let backend_hash_url = "/hash";
/** @type {window.ChessBoard} @private */
-var board = null;
+let board = null;
/** @type {boolean} @private */
-var board_is_animating = false;
+let board_is_animating = false;
/**
* The most recent analysis data we have from the server
*
* @type {?Object}
* @private */
-var current_analysis_data = null;
+let current_analysis_data = null;
/**
* If we are displaying previous analysis or from hash, this is non-null,
* @type {?Object}
* @private
*/
-var displayed_analysis_data = null;
+let displayed_analysis_data = null;
/**
* Games currently in progress, if any.
* }>}
* @private
*/
-var current_games = null;
+let current_games = null;
/** @type {Array.<{
* from_col: number,
* }>}
* @private
*/
-var arrows = [];
+let arrows = [];
/** @type {Array.<Array.<boolean>>} */
-var occupied_by_arrows = [];
+let occupied_by_arrows = [];
/** Currently displayed refutation lines (on-screen).
* Can either come from the current_analysis_data, displayed_analysis_data,
* or hash_refutation_lines.
*/
-var refutation_lines = [];
+let refutation_lines = [];
/** Refutation lines from current hash probe.
*
* If non-null, will override refutation lines from the base position.
* Note that these are relative to display_fen, not base_fen.
*/
-var hash_refutation_lines = null;
+let hash_refutation_lines = null;
/** @type {!number} @private */
-var move_num = 1;
+let move_num = 1;
/** @type {!string} @private */
-var toplay = 'W';
+let toplay = 'W';
/** @type {number} @private */
-var ims = 0;
+let ims = 0;
/** @type {boolean} @private */
-var truncate_display_history = true;
+let truncate_display_history = true;
/** @type {!string|undefined} @private */
-var highlight_from = undefined;
+let highlight_from = undefined;
/** @type {!string|undefined} @private */
-var highlight_to = undefined;
+let highlight_to = undefined;
/** The HTML object of the move currently being highlighted (in red).
* @type {?Element}
* @private */
-var highlighted_move = null;
+let highlighted_move = null;
/** Currently suggested/recommended move when dragging.
* @type {?{from: !string, to: !string}}
* @private
*/
-var recommended_move = null;
+let recommended_move = null;
/** If reverse-dragging (dragging from the destination square to the
* source square), the destination square.
* @type {?string}
* @private
*/
-var reverse_dragging_from = null;
+let reverse_dragging_from = null;
/** @type {?number} @private */
-var unique = null;
+let unique = null;
/** @type {boolean} @private */
-var enable_sound = false;
+let enable_sound = false;
/** @type {!number} @private */
-var delay_ms = 0;
+let delay_ms = 0;
/**
* Our best estimate of how many milliseconds we need to add to
* @type {?number}
* @private
*/
-var client_clock_offset_ms = null;
+let client_clock_offset_ms = null;
-var clock_timer = null;
+let clock_timer = null;
/** The current position being analyzed, represented as a FEN string.
* Note that this is not necessarily the same as display_fen.
* @type {?string}
* @private
*/
-var base_fen = null;
+let base_fen = null;
/** The current position on the board, represented as a FEN string.
* Note that board.fen() does not contain e.g. who is to play.
* @type {?string}
* @private
*/
-var display_fen = null;
+let display_fen = null;
/** @typedef {{
* start_fen: string,
* @type {Array.<DisplayLine>}
* @private
*/
-var display_lines = [];
+let display_lines = [];
/** @type {?DisplayLine} @private */
-var current_display_line = null;
+let current_display_line = null;
/** @type {boolean} @private */
-var current_display_line_is_history = false;
+let current_display_line_is_history = false;
/** @type {?number} @private */
-var current_display_move = null;
+let current_display_move = null;
/**
* The current backend request to get main analysis (not history), if any,
* @type {?AbortController}
* @private
*/
-var current_analysis_xhr = null;
+let current_analysis_xhr = null;
/**
* The current timer to fire off a request to get main analysis (not history),
* @type {?Number}
* @private
*/
-var current_analysis_request_timer = null;
+let current_analysis_request_timer = null;
/**
* The current backend request to get historic data, if any.
* @type {?AbortController}
* @private
*/
-var current_historic_xhr = null;
+let current_historic_xhr = null;
/**
* The current backend request to get hash probes, if any, so that we can abort it.
* @type {?AbortController}
* @private
*/
-var current_hash_xhr = null;
+let current_hash_xhr = null;
/**
* The current timer to display hash probe information (it could be waiting on the
* @type {?Number}
* @private
*/
-var current_hash_display_timer = null;
+let current_hash_display_timer = null;
-var supports_html5_storage = function() {
+let supports_html5_storage = function() {
try {
return 'localStorage' in window && window['localStorage'] !== null;
} catch (e) {
// Make the unique token persistent so people refreshing the page won't count twice.
// Of course, you can never fully protect against people deliberately wanting to spam.
-var get_unique = function() {
- var use_local_storage = supports_html5_storage();
+let get_unique = function() {
+ let use_local_storage = supports_html5_storage();
if (use_local_storage && window['localStorage']['unique']) {
return window['localStorage']['unique'];
}
- var unique = Math.random();
+ let unique = Math.random();
if (use_local_storage) {
window['localStorage']['unique'] = unique;
}
return unique;
}
-var request_update = function() {
+let request_update = function() {
current_analysis_request_timer = null;
let handle_err = () => {
// Next update.
if (!backend_url.match(/history/)) {
- var timeout = 100;
+ let timeout = 100;
current_analysis_request_timer = setTimeout(function() { request_update(); }, timeout);
}
})
}
-var process_update_response = function(data, headers) {
+let process_update_response = function(data, headers) {
sync_server_clock(headers.get('Date'));
ims = headers.get('X-RGLM');
- var num_viewers = headers.get('X-RGNV');
- var new_data;
+ let num_viewers = headers.get('X-RGNV');
+ let new_data;
if (Array.isArray(data)) {
new_data = JSON.parse(JSON.stringify(current_analysis_data));
JSON_delta.patch(new_data, data);
new_data = data;
}
- var minimum_version = headers.get('X-RGMV');
+ let minimum_version = headers.get('X-RGMV');
if (minimum_version && minimum_version > SCRIPT_VERSION) {
// Upgrade to latest version with a force-reload.
location.reload(true);
}
// Verify that the PV makes sense.
- var valid = true;
+ let valid = true;
if (new_data['pv']) {
- var hiddenboard = new Chess(new_data['position']['fen']);
- for (var i = 0; i < new_data['pv'].length; ++i) {
+ let hiddenboard = new Chess(new_data['position']['fen']);
+ for (let i = 0; i < new_data['pv'].length; ++i) {
if (hiddenboard.move(new_data['pv'][i]) === null) {
valid = false;
break;
}
}
-var possibly_play_sound = function(old_data, new_data) {
+let possibly_play_sound = function(old_data, new_data) {
if (!enable_sound) {
return;
}
if (old_data === null) {
return;
}
- var ding = document.getElementById('ding');
+ let ding = document.getElementById('ding');
if (ding && ding.play) {
if (old_data['position'] && old_data['position']['fen'] &&
new_data['position'] && new_data['position']['fen'] &&
/**
* @type {!string} server_date_string
*/
-var sync_server_clock = function(server_date_string) {
- var server_time_ms = new Date(server_date_string).getTime();
- var client_time_ms = new Date().getTime();
- var estimated_offset_ms = server_time_ms - client_time_ms;
+let sync_server_clock = function(server_date_string) {
+ let server_time_ms = new Date(server_date_string).getTime();
+ let client_time_ms = new Date().getTime();
+ let estimated_offset_ms = server_time_ms - client_time_ms;
// In order not to let the noise move us too much back and forth
// (the server only has one-second resolution anyway), we only
}
}
-var clear_arrows = function() {
- for (var i = 0; i < arrows.length; ++i) {
+let clear_arrows = function() {
+ for (let i = 0; i < arrows.length; ++i) {
if (arrows[i].svg) {
if (arrows[i].svg.parentElement) {
arrows[i].svg.parentElement.removeChild(arrows[i].svg);
arrows = [];
occupied_by_arrows = [];
- for (var y = 0; y < 8; ++y) {
+ for (let y = 0; y < 8; ++y) {
occupied_by_arrows.push([false, false, false, false, false, false, false, false]);
}
}
-var redraw_arrows = function() {
- for (var i = 0; i < arrows.length; ++i) {
+let redraw_arrows = function() {
+ for (let i = 0; i < arrows.length; ++i) {
position_arrow(arrows[i]);
}
}
/** @param {!number} x
* @return {!number}
*/
-var sign = function(x) {
+let sign = function(x) {
if (x > 0) {
return 1;
} else if (x < 0) {
* @param {!string} to The square the arrow is to (e.g. e4).
* @return {boolean}
*/
-var interfering_arrow = function(from, to) {
- var from_col = from.charCodeAt(0) - "a1".charCodeAt(0);
- var from_row = from.charCodeAt(1) - "a1".charCodeAt(1);
- var to_col = to.charCodeAt(0) - "a1".charCodeAt(0);
- var to_row = to.charCodeAt(1) - "a1".charCodeAt(1);
+let interfering_arrow = function(from, to) {
+ let from_col = from.charCodeAt(0) - "a1".charCodeAt(0);
+ let from_row = from.charCodeAt(1) - "a1".charCodeAt(1);
+ let to_col = to.charCodeAt(0) - "a1".charCodeAt(0);
+ let to_row = to.charCodeAt(1) - "a1".charCodeAt(1);
occupied_by_arrows[from_row][from_col] = true;
}
// Sliding piece: Check if anything except the from-square is seen before.
- var dx = sign(to_col - from_col);
- var dy = sign(to_row - from_row);
- var x = from_col;
- var y = from_row;
+ let dx = sign(to_col - from_col);
+ let dy = sign(to_row - from_row);
+ let x = from_col;
+ let y = from_row;
do {
x += dx;
y += dy;
* @param {!number} u
* @return {!string} The point in "x y" form, suitable for SVG paths.
*/
-var point_from_start = function(x1, y1, x2, y2, t, u) {
- var dx = x2 - x1;
- var dy = y2 - y1;
+let point_from_start = function(x1, y1, x2, y2, t, u) {
+ let dx = x2 - x1;
+ let dy = y2 - y1;
- var norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
+ let norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
dx *= norm;
dy *= norm;
- var x = x1 + dx * t + dy * u;
- var y = y1 + dy * t - dx * u;
+ let x = x1 + dx * t + dy * u;
+ let y = y1 + dy * t - dx * u;
return x + " " + y;
}
* @param {!number} u
* @return {!string} The point in "x y" form, suitable for SVG paths.
*/
-var point_from_end = function(x1, y1, x2, y2, t, u) {
- var dx = x2 - x1;
- var dy = y2 - y1;
+let point_from_end = function(x1, y1, x2, y2, t, u) {
+ let dx = x2 - x1;
+ let dy = y2 - y1;
- var norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
+ let norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
dx *= norm;
dy *= norm;
- var x = x2 + dx * t + dy * u;
- var y = y2 + dy * t - dx * u;
+ let x = x2 + dx * t + dy * u;
+ let y = y2 + dy * t - dx * u;
return x + " " + y;
}
-var position_arrow = function(arrow) {
+let position_arrow = function(arrow) {
if (arrow.svg) {
if (arrow.svg.parentElement) {
arrow.svg.parentElement.removeChild(arrow.svg);
return;
}
- var zoom_factor = document.getElementById("board").getBoundingClientRect().width / 400.0;
- var line_width = arrow.line_width * zoom_factor;
- var arrow_size = arrow.arrow_size * zoom_factor;
+ let zoom_factor = document.getElementById("board").getBoundingClientRect().width / 400.0;
+ let line_width = arrow.line_width * zoom_factor;
+ let arrow_size = arrow.arrow_size * zoom_factor;
- var square_width = document.querySelector(".square-a8").getBoundingClientRect().width;
- var from_y, to_y, from_x, to_x;
+ let square_width = document.querySelector(".square-a8").getBoundingClientRect().width;
+ let from_y, to_y, from_x, to_x;
if (board.orientation() === 'black') {
from_y = (arrow.from_row + 0.5)*square_width;
to_y = (arrow.to_row + 0.5)*square_width;
to_x = (arrow.to_col + 0.5)*square_width;
}
- var SVG_NS = "http://www.w3.org/2000/svg";
- var XHTML_NS = "http://www.w3.org/1999/xhtml";
- var svg = document.createElementNS(SVG_NS, "svg");
+ let SVG_NS = "http://www.w3.org/2000/svg";
+ let XHTML_NS = "http://www.w3.org/1999/xhtml";
+ let svg = document.createElementNS(SVG_NS, "svg");
svg.setAttribute("width", /** @type{number} */ (document.getElementById("board").getBoundingClientRect().width));
svg.setAttribute("height", /** @type{number} */ (document.getElementById("board").getBoundingClientRect().height));
svg.setAttribute("style", "position: absolute");
svg.setAttribute("class", "c1");
svg.setAttribute("xmlns", XHTML_NS);
- var x1 = from_x;
- var y1 = from_y;
- var x2 = to_x;
- var y2 = to_y;
+ let x1 = from_x;
+ let y1 = from_y;
+ let x2 = to_x;
+ let y2 = to_y;
// Draw the line.
- var outline = document.createElementNS(SVG_NS, "path");
+ let outline = document.createElementNS(SVG_NS, "path");
outline.setAttribute("d", "M " + point_from_start(x1, y1, x2, y2, arrow_size / 2, 0) + " L " + point_from_end(x1, y1, x2, y2, -arrow_size / 2, 0));
outline.setAttribute("xmlns", XHTML_NS);
outline.setAttribute("stroke", "#666");
outline.setAttribute("fill", "none");
svg.appendChild(outline);
- var path = document.createElementNS(SVG_NS, "path");
+ let path = document.createElementNS(SVG_NS, "path");
path.setAttribute("d", "M " + point_from_start(x1, y1, x2, y2, arrow_size / 2, 0) + " L " + point_from_end(x1, y1, x2, y2, -arrow_size / 2, 0));
path.setAttribute("xmlns", XHTML_NS);
path.setAttribute("stroke", arrow.fg_color);
svg.appendChild(path);
// Then the arrow head.
- var head = document.createElementNS(SVG_NS, "path");
+ let head = document.createElementNS(SVG_NS, "path");
head.setAttribute("d",
"M " + point_from_end(x1, y1, x2, y2, 0, 0) +
" L " + point_from_end(x1, y1, x2, y2, -arrow_size, -arrow_size / 2) +
* @param {number} line_width
* @param {number} arrow_size
*/
-var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_size) {
- var from_col = from_square.charCodeAt(0) - "a1".charCodeAt(0);
- var from_row = from_square.charCodeAt(1) - "a1".charCodeAt(1);
- var to_col = to_square.charCodeAt(0) - "a1".charCodeAt(0);
- var to_row = to_square.charCodeAt(1) - "a1".charCodeAt(1);
+let create_arrow = function(from_square, to_square, fg_color, line_width, arrow_size) {
+ let from_col = from_square.charCodeAt(0) - "a1".charCodeAt(0);
+ let from_row = from_square.charCodeAt(1) - "a1".charCodeAt(1);
+ let to_col = to_square.charCodeAt(0) - "a1".charCodeAt(0);
+ let to_row = to_square.charCodeAt(1) - "a1".charCodeAt(1);
// Create arrow.
- var arrow = {
+ let arrow = {
from_col: from_col,
from_row: from_row,
to_col: to_col,
arrows.push(arrow);
}
-var compare_by_score = function(refutation_lines, invert, a, b) {
- var sa = compute_score_sort_key(refutation_lines[b]['score'], refutation_lines[b]['depth'], invert);
- var sb = compute_score_sort_key(refutation_lines[a]['score'], refutation_lines[a]['depth'], invert);
+let compare_by_score = function(refutation_lines, invert, a, b) {
+ let sa = compute_score_sort_key(refutation_lines[b]['score'], refutation_lines[b]['depth'], invert);
+ let sb = compute_score_sort_key(refutation_lines[a]['score'], refutation_lines[a]['depth'], invert);
return sa - sb;
}
* @return {Array.<string>} The FEN representation (e.g. Ne4) of all
* moves, in score order.
*/
-var find_nonstupid_moves = function(data, margin, invert) {
+let find_nonstupid_moves = function(data, margin, invert) {
// First of all, if there are any moves that are more than 0.5 ahead of
// the primary move, the refutation lines are probably bunk, so just
// kill them all.
- var best_score = undefined;
- var pv_score = undefined;
- for (var move in data['refutation_lines']) {
- var line = data['refutation_lines'][move];
- var score = compute_score_sort_key(line['score'], line['depth'], invert, false);
+ let best_score = undefined;
+ let pv_score = undefined;
+ for (let move in data['refutation_lines']) {
+ let line = data['refutation_lines'][move];
+ let score = compute_score_sort_key(line['score'], line['depth'], invert, false);
if (move == data['pv'][0]) {
pv_score = score;
}
// Now find all moves that are within “margin” of the best score.
// The PV move will always be first.
- var moves = [];
- for (var move in data['refutation_lines']) {
- var line = data['refutation_lines'][move];
- var score = compute_score_sort_key(line['score'], line['depth'], invert);
+ let moves = [];
+ for (let move in data['refutation_lines']) {
+ let line = data['refutation_lines'][move];
+ let score = compute_score_sort_key(line['score'], line['depth'], invert);
if (move != data['pv'][0] && best_score - score <= margin) {
moves.push(move);
}
* @param {number} x
* @return {!string}
*/
-var thousands = function(x) {
+let thousands = function(x) {
return String(x).split('').reverse().join('').replace(/(\d{3}\B)/g, '$1,').split('').reverse().join('');
}
* @param {number=} opt_limit
* @param {boolean=} opt_showlast
*/
-var add_pv = function(start_fen, pv, move_num, toplay, scores, start_display_move_num, opt_limit, opt_showlast) {
+let add_pv = function(start_fen, pv, move_num, toplay, scores, start_display_move_num, opt_limit, opt_showlast) {
display_lines.push({
start_fen: start_fen,
pv: pv,
scores: scores,
start_display_move_num: start_display_move_num
});
- var splicepos = null;
+ let splicepos = null;
if (scores !== null && scores.length >= 1 &&
scores[scores.length - 1].score !== undefined &&
scores[scores.length - 1].score !== null &&
* @param {number=} opt_limit If set, show at most this number of moves.
* @param {boolean=} opt_showlast If limit is set, show the last moves instead of the first ones.
*/
-var print_pv = function(line_num, splicepos, opt_limit, opt_showlast) {
- var display_line = display_lines[line_num];
- var pv = display_line.pv;
- var move_num = display_line.move_num;
- var toplay = display_line.toplay;
+let print_pv = function(line_num, splicepos, opt_limit, opt_showlast) {
+ let display_line = display_lines[line_num];
+ let pv = display_line.pv;
+ let move_num = display_line.move_num;
+ let toplay = display_line.toplay;
// Truncate PV at the start if needed.
- var start_display_move_num = display_line.start_display_move_num;
+ let start_display_move_num = display_line.start_display_move_num;
if (start_display_move_num > 0) {
pv = pv.slice(start_display_move_num);
- var to_add = start_display_move_num;
+ let to_add = start_display_move_num;
if (toplay === 'B') {
++move_num;
toplay = 'W';
}
}
- var ret = '';
- var i = 0;
- var in_tb = false;
+ let ret = '';
+ let i = 0;
+ let in_tb = false;
if (opt_limit && opt_showlast && pv.length > opt_limit) {
// Truncate the PV at the beginning (instead of at the end).
// We assume here that toplay is 'W'. We also assume that if
}
move_num += i / 2;
} else if (toplay == 'B' && pv.length > 0) {
- var move = "";
+ let move = "";
if (splicepos === 0) {
move += "(TB: ";
in_tb = true;
++move_num;
}
for ( ; i < pv.length; ++i) {
-
var move = "<a class=\"move\" id=\"automove" + line_num + "-" + i + "\" href=\"javascript:show_line(" + line_num + ", " + i + ");\">" + pv[i] + "</a>";
+
let move = "<a class=\"move\" id=\"automove" + line_num + "-" + i + "\" href=\"javascript:show_line(" + line_num + ", " + i + ");\">" + pv[i] + "</a>";
if (splicepos === i) {
ret += " (TB: ";
in_tb = true;
}
/** Update the highlighted to/from squares on the board.
- * Based on the global "highlight_from" and "highlight_to" variables.
+ * Based on the global "highlight_from" and "highlight_to" letiables.
*/
-var update_board_highlight = function() {
+let update_board_highlight = function() {
document.getElementById("board").querySelectorAll('.square-55d63').forEach((square) => square.classList.remove('nonuglyhighlight'));
if ((current_display_line === null || current_display_line_is_history) &&
highlight_from !== undefined && highlight_to !== undefined) {
}
}
-var update_history = function() {
+let update_history = function() {
if (display_lines[0] === null || display_lines[0].pv.length == 0) {
document.getElementById("history").innerHTML = "No history";
} else if (truncate_display_history) {
/**
* @param {!boolean} truncate_history
*/
-var collapse_history = function(truncate_history) {
+let collapse_history = function(truncate_history) {
truncate_display_history = truncate_history;
update_history();
}
*
* Also recreates the global "display_lines".
*/
-var update_refutation_lines = function() {
+let update_refutation_lines = function() {
if (base_fen === null) {
return;
}
// Truncate so that only the history and PV is left.
display_lines = [ display_lines[0], display_lines[1] ];
}
- var tbl = document.getElementById("refutationlines");
+ let tbl = document.getElementById("refutationlines");
tbl.replaceChildren();
if (display_lines.length < 2) {
}
// Find out where the lines start from.
- var base_line = [];
- var base_scores = display_lines[1].scores;
- var start_display_move_num = 0;
+ let base_line = [];
+ let base_scores = display_lines[1].scores;
+ let start_display_move_num = 0;
if (hash_refutation_lines) {
base_line = current_display_line.pv.slice(0, current_display_move + 1);
base_scores = current_display_line.scores;
start_display_move_num = base_line.length;
}
- var moves = [];
- for (var move in refutation_lines) {
+ let moves = [];
+ for (let move in refutation_lines) {
moves.push(move);
}
- var invert = (toplay === 'B');
+ let invert = (toplay === 'B');
if (current_display_line && current_display_move % 2 == 0 && !current_display_line_is_history) {
invert = !invert;
}
moves = moves.sort(function(a, b) { return compare_by_score(refutation_lines, invert, a, b) });
- for (var i = 0; i < moves.length; ++i) {
- var line = refutation_lines[moves[i]];
+ for (let i = 0; i < moves.length; ++i) {
+ let line = refutation_lines[moves[i]];
- var tr = document.createElement("tr");
+ let tr = document.createElement("tr");
- var move_td = document.createElement("td");
+ let move_td = document.createElement("td");
tr.appendChild(move_td);
move_td.classList.add("move");
- var scores = base_scores.concat([{ first_move: start_display_move_num, score: line['score'] }]);
+ let scores = base_scores.concat([{ first_move: start_display_move_num, score: line['score'] }]);
if (line['pv'].length == 0) {
// Not found, so just make a one-move PV.
-
var move = "<a class=\"move\" href=\"javascript:show_line(" + display_lines.length + ", " + 0 + ");\">" + line['move'] + "</a>";
+
let move = "<a class=\"move\" href=\"javascript:show_line(" + display_lines.length + ", " + 0 + ");\">" + line['move'] + "</a>";
move_td.innerHTML = move;
- var score_td = document.createElement("td");
+ let score_td = document.createElement("td");
score_td.classList.add("score");
score_td.textContent = "—";
tr.appendChild(score_td);
- var depth_td = document.createElement("td");
+ let depth_td = document.createElement("td");
tr.appendChild(depth_td);
depth_td.classList.add("depth");
depth_td.textContent = "—";
- var pv_td = document.createElement("td");
+ let pv_td = document.createElement("td");
tr.appendChild(pv_td);
pv_td.classList.add("pv");
pv_td.innerHTML = add_pv(base_fen, base_line.concat([ line['move'] ]), move_num, toplay, scores, start_display_move_num);
continue;
}
-
var move = "<a class=\"move\" href=\"javascript:show_line(" + display_lines.length + ", " + 0 + ");\">" + line['move'] + "</a>";
+
let move = "<a class=\"move\" href=\"javascript:show_line(" + display_lines.length + ", " + 0 + ");\">" + line['move'] + "</a>";
move_td.innerHTML = move;
- var score_td = document.createElement("td");
+ let score_td = document.createElement("td");
tr.appendChild(score_td);
score_td.classList.add("score");
score_td.textContent = format_short_score(line['score']);
- var depth_td = document.createElement("td");
+ let depth_td = document.createElement("td");
tr.appendChild(depth_td);
depth_td.classList.add("depth");
if (line['depth'] && line['depth'] >= 0) {
depth_td.textContent = "—";
}
- var pv_td = document.createElement("td");
+ let pv_td = document.createElement("td");
tr.appendChild(pv_td);
pv_td.classList.add("pv");
pv_td.innerHTML = add_pv(base_fen, base_line.concat(line['pv']), move_num, toplay, scores, start_display_move_num, 10);
* @param {Array.<string>} moves
* @param {number} last_move
*/
-var chess_from = function(fen, moves, last_move) {
- var hiddenboard = new Chess();
+let chess_from = function(fen, moves, last_move) {
+ let hiddenboard = new Chess();
if (fen !== null && fen !== undefined) {
hiddenboard.load(fen);
}
- for (var i = 0; i <= last_move; ++i) {
+ for (let i = 0; i <= last_move; ++i) {
if (moves[i] === '0-0') {
hiddenboard.move('O-O');
} else if (moves[i] === '0-0-0') {
return hiddenboard;
}
-var update_game_list = function(games) {
+let update_game_list = function(games) {
document.getElementById("games").textContent = "";
if (games === null) {
return;
}
- var games_div = document.getElementById('games');
- for (var game_num = 0; game_num < games.length; ++game_num) {
- var game = games[game_num];
- var game_span = document.createElement("span");
+ let games_div = document.getElementById('games');
+ for (let game_num = 0; game_num < games.length; ++game_num) {
+ let game = games[game_num];
+ let game_span = document.createElement("span");
game_span.setAttribute("class", "game");
- var game_name = document.createTextNode(game['name']);
+ let game_name = document.createTextNode(game['name']);
if (game['url'] === backend_url) {
// This game.
game_span.appendChild(game_name);
if (current_analysis_data && current_analysis_data['position']) {
- var score;
+ let score;
if (current_analysis_data['position']['result']) {
score = " (" + current_analysis_data['position']['result'] + ")";
} else {
}
} else {
// Some other game.
- var game_a = document.createElement("a");
+ let game_a = document.createElement("a");
game_a.setAttribute("href", "#" + game['id']);
game_a.appendChild(game_name);
game_span.appendChild(game_a);
- var score;
+ let score;
if (game['result']) {
score = " (" + game['result'] + ")";
} else {
* Try to find a running game that matches with the current hash,
* and switch to it if we're not already displaying it.
*/
-var possibly_switch_game_from_hash = function() {
- var history_match = window.location.hash.match(/^#history=([a-zA-Z0-9_-]+)/);
+let possibly_switch_game_from_hash = function() {
+ let history_match = window.location.hash.match(/^#history=([a-zA-Z0-9_-]+)/);
if (history_match !== null) {
- var game_id = history_match[1];
- var fake_game = {
+ let game_id = history_match[1];
+ let fake_game = {
url: '/history/' + game_id + '.json',
hashurl: '',
id: 'history=' + game_id
return;
}
- var hash = window.location.hash.replace(/^#/,'');
- for (var i = 0; i < current_games.length; ++i) {
+ let hash = window.location.hash.replace(/^#/,'');
+ for (let i = 0; i < current_games.length; ++i) {
if (current_games[i]['id'] === hash) {
if (backend_url !== current_games[i]['url']) {
switch_backend(current_games[i]);
* If this is a Chess960 castling which doesn't move the king,
* move the rook instead.
*/
-var patch_move = function(move) {
+let patch_move = function(move) {
if (move === null) return null;
if (move.from !== move.to) return move;
- var f = move.rook_sq & 15;
- var r = move.rook_sq >> 4;
- var from = ('abcdefgh'.substring(f,f+1) + '87654321'.substring(r,r+1));
- var to = move.to;
+ let f = move.rook_sq & 15;
+ let r = move.rook_sq >> 4;
+ let from = ('abcdefgh'.substring(f,f+1) + '87654321'.substring(r,r+1));
+ let to = move.to;
if (move.to === 'g1') {
to = 'f1';
/** Update all the HTML on the page, based on current global state.
*/
-var update_board = function() {
+let update_board = function() {
document.body.style.opacity = null;
- var data = displayed_analysis_data || current_analysis_data;
- var current_data = current_analysis_data; // Convenience alias.
+ let data = displayed_analysis_data || current_analysis_data;
+ let current_data = current_analysis_data; // Convenience alias.
display_lines = [];
// unconditionally taken from current_data (we're not interested in
// historic history).
if (current_data['position']['history']) {
- var start = (current_data['position'] && current_data['position']['start_fen']) ? current_data['position']['start_fen'] : 'start';
+ let start = (current_data['position'] && current_data['position']['start_fen']) ? current_data['position']['start_fen'] : 'start';
add_pv(start, current_data['position']['history'], 1, 'W', null, 0, 8, true);
} else {
display_lines.push(null);
// The headline. Names are always fetched from current_data;
// the rest can depend a bit.
- var headline;
+ let headline;
if (current_data &&
current_data['position']['player_w'] && current_data['position']['player_b']) {
headline = current_data['position']['player_w'] + '–' +
// Credits: Move source, possibly with URL.
if (current_data['move_source'] && current_data['move_source_url']) {
document.getElementById("movesource").textContent = "Moves provided by ";
- var movesource_a = document.createElement("a");
+ let movesource_a = document.createElement("a");
movesource_a.setAttribute("href", current_data['move_source_url']);
- var movesource_text = document.createTextNode(current_data['move_source']);
+ let movesource_text = document.createTextNode(current_data['move_source']);
movesource_a.appendChild(movesource_text);
- var movesource_period = document.createTextNode(".");
+ let movesource_period = document.createTextNode(".");
document.getElementById("movesource").appendChild(movesource_a);
document.getElementById("movesource").appendChild(movesource_period);
} else if (current_data['move_source']) {
document.getElementById("movesource").textContent = "";
}
- var last_move;
+ let last_move;
if (displayed_analysis_data) {
// Displaying some non-current position, pick out the last move
// from the history. This will work even if the fetch failed.
}
} else if (data['position']['last_move'] !== 'none') {
// Find the previous move.
- var previous_move_num, previous_toplay;
+ let previous_move_num, previous_toplay;
if (data['position']['toplay'] == 'B') {
previous_move_num = data['position']['move_num'];
previous_toplay = 'W';
document.getElementById("headline").textContent = headline;
// The <title> contains a very brief headline.
- var title_elems = [];
+ let title_elems = [];
if (data['position'] && data['position']['result']) {
title_elems.push(data['position']['result']);
} else if (data['score']) {
// We don't have historic analysis for this position, but we
// can reconstruct what the last move was by just replaying
// from the start.
- var position = (data['position'] && data['position']['start_fen']) ? data['position']['start_fen'] : null;
- var hiddenboard = chess_from(position, current_display_line.pv, current_display_move);
- var moves = hiddenboard.history({ verbose: true });
+ let position = (data['position'] && data['position']['start_fen']) ? data['position']['start_fen'] : null;
+ let hiddenboard = chess_from(position, current_display_line.pv, current_display_move);
+ let moves = hiddenboard.history({ verbose: true });
last_move = moves.pop();
highlight_from = last_move.from;
highlight_to = last_move.to;
// The score.
if (current_display_line && !current_display_line_is_history) {
- var score;
+ let score;
if (current_display_line.scores && current_display_line.scores.length > 0) {
- for (var i = 0; i < current_display_line.scores.length; ++i) {
+ for (let i = 0; i < current_display_line.scores.length; ++i) {
if (current_display_move < current_display_line.scores[i].first_move) {
break;
}
} else if (data['tablebase'] == 1) {
document.getElementById("searchstats").textContent = "Tablebase result";
} else if (data['nodes'] && data['nps'] && data['depth']) {
- var stats = thousands(data['nodes']) + ' nodes, ' + thousands(data['nps']) + ' nodes/sec, depth ' + data['depth'] + ' ply';
+ let stats = thousands(data['nodes']) + ' nodes, ' + thousands(data['nps']) + ' nodes/sec, depth ' + data['depth'] + ' ply';
if (data['seldepth']) {
stats += ' (' + data['seldepth'] + ' selective)';
}
// Print the PV.
document.getElementById("pvtitle").textContent = "PV:";
- var scores = [{ first_move: -1, score: data['score'] }];
+ let scores = [{ first_move: -1, score: data['score'] }];
document.getElementById("pv").innerHTML = add_pv(data['position']['fen'], data['pv'], data['position']['move_num'], data['position']['toplay'], scores, 0);
// Update the PV arrow.
clear_arrows();
if (data['pv'].length >= 1) {
- var hiddenboard = new Chess(base_fen);
+ let hiddenboard = new Chess(base_fen);
// draw a continuation arrow as long as it's the same piece
- var last_to;
- for (var i = 0; i < data['pv'].length; i += 2) {
- var move = patch_move(hiddenboard.move(data['pv'][i]));
+ let last_to;
+ for (let i = 0; i < data['pv'].length; i += 2) {
+ let move = patch_move(hiddenboard.move(data['pv'][i]));
if ((i >= 2 && move.from != last_to) ||
interfering_arrow(move.from, move.to)) {
hiddenboard.move(data['pv'][i + 1]); // To keep continuity.
}
- var alt_moves = find_nonstupid_moves(data, 30, data['position']['toplay'] === 'B');
- for (var i = 1; i < alt_moves.length && i < 3; ++i) {
+ let alt_moves = find_nonstupid_moves(data, 30, data['position']['toplay'] === 'B');
+ for (let i = 1; i < alt_moves.length && i < 3; ++i) {
hiddenboard = new Chess(base_fen);
- var move = patch_move(hiddenboard.move(alt_moves[i]));
+ let move = patch_move(hiddenboard.move(alt_moves[i]));
if (move !== null) {
create_arrow(move.from, move.to, '#f66', 1, 10);
}
// See if all semi-reasonable moves have only one possible response.
if (data['pv'].length >= 2) {
- var nonstupid_moves = find_nonstupid_moves(data, 300, data['position']['toplay'] === 'B');
- var response;
- {
- var hiddenboard = new Chess(base_fen);
- hiddenboard.move(data['pv'][0]);
- response = hiddenboard.move(data['pv'][1]);
- }
- for (var i = 0; i < nonstupid_moves.length; ++i) {
+ let nonstupid_moves = find_nonstupid_moves(data, 300, data['position']['toplay'] === 'B');
+ let hiddenboard = new Chess(base_fen);
+ hiddenboard.move(data['pv'][0]);
+ let response = hiddenboard.move(data['pv'][1]);
+ for (let i = 0; i < nonstupid_moves.length; ++i) {
if (nonstupid_moves[i] == data['pv'][0]) {
// ignore the PV move for refutation lines.
continue;
response = undefined;
break;
}
- var line = data['refutation_lines'][nonstupid_moves[i]];
+ let line = data['refutation_lines'][nonstupid_moves[i]];
hiddenboard = new Chess(base_fen);
hiddenboard.move(line['pv'][0]);
- var this_response = hiddenboard.move(line['pv'][1]);
+ let this_response = hiddenboard.move(line['pv'][1]);
if (this_response === null) {
console.log("BUG: ", i);
console.log(data);
update_sparkline(data);
}
-var update_sparkline = function(data) {
+let update_sparkline = function(data) {
let scorespark = document.getElementById('scoresparkcontainer');
scorespark.textContent = '';
if (data && data['score_history']) {
- var first_move_num = undefined;
- for (var halfmove_num in data['score_history']) {
+ let first_move_num = undefined;
+ for (let halfmove_num in data['score_history']) {
halfmove_num = parseInt(halfmove_num);
if (first_move_num === undefined || halfmove_num < first_move_num) {
first_move_num = halfmove_num;
}
}
if (first_move_num !== undefined) {
- var last_move_num = data['position']['move_num'] * 2 - 3;
+ let last_move_num = data['position']['move_num'] * 2 - 3;
if (data['position']['toplay'] === 'B') {
++last_move_num;
}
// Possibly truncate some moves if we don't have enough width.
- var max_moves = Math.floor(scorespark.getBoundingClientRect().width / 5) - 3;
+ let max_moves = Math.floor(scorespark.getBoundingClientRect().width / 5) - 3;
if (last_move_num - first_move_num > max_moves) {
first_move_num = last_move_num - max_moves;
}
- var min_score = -1;
- var max_score = 1;
- var last_score = null;
- var scores = [];
- for (var halfmove_num = first_move_num; halfmove_num <= last_move_num; ++halfmove_num) {
+ let min_score = -1;
+ let max_score = 1;
+ let last_score = null;
+ let scores = [];
+ for (let halfmove_num = first_move_num; halfmove_num <= last_move_num; ++halfmove_num) {
if (data['score_history'][halfmove_num]) {
- var score = compute_plot_score(data['score_history'][halfmove_num]);
+ let score = compute_plot_score(data['score_history'][halfmove_num]);
last_score = score;
if (score < min_score) min_score = score;
if (score > max_score) max_score = score;
}
}
-var draw_hover = function(e, color, tooltip) {
+let draw_hover = function(e, color, tooltip) {
e.target.style.fill = 'rgb(' + color[0]*100.0 + '%, ' + color[1]*100.0 + '%, ' + color[2]*100.0 + '%)';
let hover = document.getElementById('sparklinehover');
hover.style.top = top + 'px';
}
-var hide_hover = function(e, color) {
+let hide_hover = function(e, color) {
e.target.style.fill = 'rgb(' + color[0]*100.0 + '%, ' + color[1]*100.0 + '%, ' + color[2]*100.0 + '%)';
document.getElementById('sparklinehover').style.display = 'none';
}
/**
* @param {number} num_viewers
*/
-var update_num_viewers = function(num_viewers) {
- var text = "";
+let update_num_viewers = function(num_viewers) {
+ let text = "";
if (num_viewers === null) {
text = "";
} else if (num_viewers == 1) {
text = num_viewers + " current viewers";
}
if (display_fen !== null) {
- var counter = Math.floor(display_fen.split(" ")[4] / 2);
+ let counter = Math.floor(display_fen.split(" ")[4] / 2);
if (counter >= 20) {
text = text.replace("current ", "");
text += " | 50-move rule: " + counter;
document.getElementById("numviewers").textContent = text;
}
-var update_clock = function() {
+let update_clock = function() {
clearTimeout(clock_timer);
- var data = displayed_analysis_data || current_analysis_data;
+ let data = displayed_analysis_data || current_analysis_data;
if (!data) return;
if (data['position']) {
- var result = data['position']['result'];
+ let result = data['position']['result'];
if (result === '1-0') {
document.getElementById("whiteclock").textContent = "1";
document.getElementById("blackclock").textContent = "0";
}
}
- var white_clock_ms = null;
- var black_clock_ms = null;
+ let white_clock_ms = null;
+ let black_clock_ms = null;
// Static clocks.
if (data['position'] &&
}
// Dynamic clock (only one, obviously).
- var color;
+ let color;
if (data['position']['white_clock_target']) {
color = "white";
document.getElementById("whiteclock").classList.add("running-clock");
document.getElementById("whiteclock").classList.remove("running-clock");
document.getElementById("blackclock").classList.remove("running-clock");
}
- var remaining_ms;
+ let remaining_ms;
if (color) {
- var now = new Date().getTime() + client_clock_offset_ms;
+ let now = new Date().getTime() + client_clock_offset_ms;
remaining_ms = data['position'][color + '_clock_target'] * 1000 - now;
if (color === "white") {
white_clock_ms = remaining_ms;
// If either player has twenty minutes or less left, add the second counters.
// This matches what DGT clocks do.
- var show_seconds = (white_clock_ms < 60 * 20 * 1000 || black_clock_ms < 60 * 20 * 1000);
+ let show_seconds = (white_clock_ms < 60 * 20 * 1000 || black_clock_ms < 60 * 20 * 1000);
if (color) {
// See when the clock will change next, and update right after that.
- var next_update_ms;
+ let next_update_ms;
if (show_seconds) {
next_update_ms = remaining_ms % 1000 + 100;
} else {
* @param {Number} remaining_ms
* @param {boolean} show_seconds
*/
-var format_clock = function(remaining_ms, show_seconds) {
+let format_clock = function(remaining_ms, show_seconds) {
if (remaining_ms <= 0) {
if (show_seconds) {
return "00:00:00";
}
}
- var remaining = Math.floor(remaining_ms / 1000);
- var seconds = remaining % 60;
+ let remaining = Math.floor(remaining_ms / 1000);
+ let seconds = remaining % 60;
remaining = (remaining - seconds) / 60;
- var minutes = remaining % 60;
+ let minutes = remaining % 60;
remaining = (remaining - minutes) / 60;
- var hours = remaining;
+ let hours = remaining;
if (show_seconds) {
return format_2d(hours) + ":" + format_2d(minutes) + ":" + format_2d(seconds);
} else {
/**
* @param {Number} x
*/
-var format_2d = function(x) {
+let format_2d = function(x) {
if (x >= 10) {
return x;
} else {
* @param {Number} move_num Move number of this move.
* @param {boolean} white_to_play Whether white is to play this move.
*/
-var format_move_with_number = function(move, move_num, white_to_play) {
- var ret;
+let format_move_with_number = function(move, move_num, white_to_play) {
+ let ret;
if (white_to_play) {
ret = move_num + '. ';
} else {
* @param {Number} halfmove_num Half-move number that is to be played,
* starting from 0.
*/
-var format_halfmove_with_number = function(move, halfmove_num) {
+let format_halfmove_with_number = function(move, halfmove_num) {
return format_move_with_number(
move,
Math.floor(halfmove_num / 2) + 1,
* @param {Object} data
* @param {Number} halfmove_num
*/
-var format_tooltip = function(data, halfmove_num) {
+let format_tooltip = function(data, halfmove_num) {
if (data['score_history'][halfmove_num + 1] ||
(halfmove_num + 1) === data['position']['history'].length) {
// Position is in the history, or it is the current position
// (which is implicitly tacked onto the history).
- var move;
- var short_score;
+ let move;
+ let short_score;
if ((halfmove_num + 1) === data['position']['history'].length) {
move = data['position']['last_move'];
short_score = format_short_score(data['score']);
if (halfmove_num === -1) {
return "Start position: " + short_score;
} else {
- var move_with_number = format_halfmove_with_number(move, halfmove_num);
+ let move_with_number = format_halfmove_with_number(move, halfmove_num);
return "After " + move_with_number + ": " + short_score;
}
} else {
- for (var i = halfmove_num; i --> -1; ) {
+ for (let i = halfmove_num; i --> -1; ) {
if (data['score_history'][i]) {
- var move = data['position']['history'][i];
+ let move = data['position']['history'][i];
if (i === -1) {
return "[Analysis kept from start position]";
} else {
/**
* @param {boolean} truncate_history
*/
-var set_truncate_history = function(truncate_history) {
+let set_truncate_history = function(truncate_history) {
truncate_display_history = truncate_history;
update_refutation_lines();
}
* @param {number} line_num
* @param {number} move_num
*/
-var show_line = function(line_num, move_num) {
+let show_line = function(line_num, move_num) {
if (line_num == -1) {
current_display_line = null;
current_display_move = null;
}
window['show_line'] = show_line;
-var prev_move = function() {
+let prev_move = function() {
if (current_display_line &&
current_display_move >= current_display_line.start_display_move_num) {
--current_display_move;
}
window['prev_move'] = prev_move;
-var next_move = function() {
+let next_move = function() {
if (current_display_line &&
current_display_move < current_display_line.pv.length - 1) {
++current_display_move;
}
window['next_move'] = next_move;
-var next_game = function() {
+let next_game = function() {
if (current_games === null) {
return;
}
// Try to find the game we are currently looking at.
- for (var game_num = 0; game_num < current_games.length; ++game_num) {
- var game = current_games[game_num];
+ for (let game_num = 0; game_num < current_games.length; ++game_num) {
+ let game = current_games[game_num];
if (game['url'] === backend_url) {
- var next_game_num = (game_num + 1) % current_games.length;
+ let next_game_num = (game_num + 1) % current_games.length;
switch_backend(current_games[next_game_num]);
return;
}
// Couldn't find it; give up.
}
-var update_historic_analysis = function() {
+let update_historic_analysis = function() {
if (!current_display_line_is_history) {
return;
}
}
// Fetch old analysis for this line if it exists.
- var hiddenboard = chess_from(current_display_line.start_fen, current_display_line.pv, current_display_move);
- var filename = "/history/move" + (current_display_move + 1) + "-" +
+ let hiddenboard = chess_from(current_display_line.start_fen, current_display_line.pv, current_display_move);
+ let filename = "/history/move" + (current_display_move + 1) + "-" +
hiddenboard.fen().replace(/ /g, '_').replace(/\//g, '-') + ".json";
let handle_err = () => {
/**
* @param {string} fen
*/
-var update_imbalance = function(fen) {
- var hiddenboard = new Chess(fen);
- var imbalance = {'k': 0, 'q': 0, 'r': 0, 'b': 0, 'n': 0, 'p': 0};
- for (var row = 0; row < 8; ++row) {
- for (var col = 0; col < 8; ++col) {
- var col_text = String.fromCharCode('a1'.charCodeAt(0) + col);
- var row_text = String.fromCharCode('a1'.charCodeAt(1) + row);
- var square = col_text + row_text;
- var contents = hiddenboard.get(square);
+let update_imbalance = function(fen) {
+ let hiddenboard = new Chess(fen);
+ let imbalance = {'k': 0, 'q': 0, 'r': 0, 'b': 0, 'n': 0, 'p': 0};
+ for (let row = 0; row < 8; ++row) {
+ for (let col = 0; col < 8; ++col) {
+ let col_text = String.fromCharCode('a1'.charCodeAt(0) + col);
+ let row_text = String.fromCharCode('a1'.charCodeAt(1) + row);
+ let square = col_text + row_text;
+ let contents = hiddenboard.get(square);
if (contents !== null) {
if (contents.color === 'w') {
++imbalance[contents.type];
}
}
}
- var white_imbalance = '';
- var black_imbalance = '';
- for (var piece in imbalance) {
- for (var i = 0; i < imbalance[piece]; ++i) {
+ let white_imbalance = '';
+ let black_imbalance = '';
+ for (let piece in imbalance) {
+ for (let i = 0; i < imbalance[piece]; ++i) {
white_imbalance += '<img src="' + svg_pieces['w' + piece.toUpperCase()] + '" alt="" style="width: 15px;height: 15px;" class="imbalance-piece">';
white_imbalance += '<img src="' + svg_pieces['b' + piece.toUpperCase()] + '" alt="" style="width: 15px;height: 15px;" class="imbalance-inverted-piece">';
}
- for (var i = 0; i < -imbalance[piece]; ++i) {
+ for (let i = 0; i < -imbalance[piece]; ++i) {
black_imbalance += '<img src="' + svg_pieces['b' + piece.toUpperCase()] + '" alt="" style="width: 15px;height: 15px;" class="imbalance-piece">';
black_imbalance += '<img src="' + svg_pieces['w' + piece.toUpperCase()] + '" alt="" style="width: 15px;height: 15px;" class="imbalance-inverted-piece">';
}
* Also replaces the PV with the current displayed line if it's not shown
* anywhere else on the screen.
*/
-var update_move_highlight = function() {
+let update_move_highlight = function() {
if (highlighted_move !== null) {
highlighted_move.classList.remove('highlight');
}
if (current_display_line) {
- var display_line_num = find_display_line_matching_num();
+ let display_line_num = find_display_line_matching_num();
if (display_line_num === null) {
// Replace the PV with the (complete) line.
document.getElementById("pvtitle").textContent = "Exploring:";
*
* @return {?number}
*/
-var find_display_line_matching_num = function() {
- for (var i = 0; i < display_lines.length; ++i) {
- var line = display_lines[i];
+let find_display_line_matching_num = function() {
+ for (let i = 0; i < display_lines.length; ++i) {
+ let line = display_lines[i];
if (line.start_display_move_num > 0) continue;
if (current_display_line.start_fen !== line.start_fen) continue;
if (current_display_line.pv.length !== line.pv.length) continue;
- var ok = true;
- for (var j = 0; j < line.pv.length; ++j) {
+ let ok = true;
+ for (let j = 0; j < line.pv.length; ++j) {
if (current_display_line.pv[j] !== line.pv[j]) {
ok = false;
break;
* TODO: This should really be called only whenever something changes,
* instead of all the time.
*/
-var update_displayed_line = function() {
+let update_displayed_line = function() {
if (current_display_line === null) {
document.getElementById("linenav").style.display = 'none';
document.getElementById("linemsg").style.display = 'revert';
document.getElementById("nextmove").innerHTML = "<a href=\"javascript:next_move();\">Next</a></span>";
}
- var hiddenboard = chess_from(current_display_line.start_fen, current_display_line.pv, current_display_move);
+ let hiddenboard = chess_from(current_display_line.start_fen, current_display_line.pv, current_display_move);
set_board_position(hiddenboard.fen());
if (display_fen !== hiddenboard.fen() && !current_display_line_is_history) {
// Fire off a hash request, since we're now off the main position
update_imbalance(hiddenboard.fen());
}
-var set_board_position = function(new_fen) {
+let set_board_position = function(new_fen) {
board_is_animating = true;
- var old_fen = board.fen();
+ let old_fen = board.fen();
board.position(new_fen);
if (board.fen() === old_fen) {
board_is_animating = false;
/**
* @param {boolean} param_enable_sound
*/
-var set_sound = function(param_enable_sound) {
+let set_sound = function(param_enable_sound) {
enable_sound = param_enable_sound;
if (enable_sound) {
document.getElementById("soundon").innerHTML = "<strong>On</strong>";
// Seemingly at least Firefox prefers MP3 over Opus; tell it otherwise,
// and also preload the file since the user has selected audio.
- var ding = document.getElementById('ding');
+ let ding = document.getElementById('ding');
if (ding && ding.canPlayType && ding.canPlayType('audio/ogg; codecs="opus"') === 'probably') {
ding.src = 'ding.opus';
ding.load();
/** Send off a hash probe request to the backend.
* @param {string} fen
*/
-var explore_hash = function(fen) {
+let explore_hash = function(fen) {
// If we already have a backend response going, abort it.
if (current_hash_xhr) {
current_hash_xhr.abort();
* @param {!Object} data
* @param {string} fen
*/
-var show_explore_hash_results = function(data, fen) {
+let show_explore_hash_results = function(data, fen) {
if (board_is_animating) {
// Updating while the animation is still going causes
// the animation to jerk. This is pretty crude, but it will do.
}
// almost all of this stuff comes from the chessboard.js example page
-var onDragStart = function(source, piece, position, orientation) {
- var pseudogame = new Chess(display_fen);
+let onDragStart = function(source, piece, position, orientation) {
+ let pseudogame = new Chess(display_fen);
if (pseudogame.game_over() === true ||
(pseudogame.turn() === 'w' && piece.search(/^b/) !== -1) ||
(pseudogame.turn() === 'b' && piece.search(/^w/) !== -1)) {
recommended_move = get_best_move(pseudogame, source, null, pseudogame.turn() === 'b');
if (recommended_move) {
- var squareEl = document.querySelector('#board .square-' + recommended_move.to);
+ let squareEl = document.querySelector('#board .square-' + recommended_move.to);
squareEl.classList.add('highlight1-32417');
}
return true;
}
-var mousedownSquare = function(e) {
+let mousedownSquare = function(e) {
if (!e.target || !e.target.matches('.square-55d63')) {
return;
}
reverse_dragging_from = null;
- var square = e.target.getAttribute('data-square');
+ let square = e.target.getAttribute('data-square');
- var pseudogame = new Chess(display_fen);
+ let pseudogame = new Chess(display_fen);
if (pseudogame.game_over() === true) {
return;
}
// If the square is empty, or has a piece of the side not to move,
// we handle it. If not, normal piece dragging will take it.
- var position = board.position();
+ let position = board.position();
if (!position.hasOwnProperty(square) ||
(pseudogame.turn() === 'w' && position[square].search(/^b/) !== -1) ||
(pseudogame.turn() === 'b' && position[square].search(/^w/) !== -1)) {
reverse_dragging_from = square;
recommended_move = get_best_move(pseudogame, null, square, pseudogame.turn() === 'b');
if (recommended_move) {
- var squareEl = document.querySelector('#board .square-' + recommended_move.from);
+ let squareEl = document.querySelector('#board .square-' + recommended_move.from);
squareEl.classList.add('highlight1-32417');
squareEl = document.querySelector('#board .square-' + recommended_move.to);
squareEl.classList.add('highlight1-32417');
}
}
-var mouseupSquare = function(e) {
+let mouseupSquare = function(e) {
if (!e.target || !e.target.matches('.square-55d63')) {
return;
}
if (reverse_dragging_from === null) {
return;
}
- var source = e.target.getAttribute('data-square');
- var target = reverse_dragging_from;
+ let source = e.target.getAttribute('data-square');
+ let target = reverse_dragging_from;
reverse_dragging_from = null;
if (onDrop(source, target) !== 'snapback') {
onSnapEnd(source, target);
});
}
-var get_best_move = function(game, source, target, invert) {
- var moves = game.moves({ verbose: true });
+let get_best_move = function(game, source, target, invert) {
+ let moves = game.moves({ verbose: true });
if (source !== null) {
moves = moves.filter(function(move) { return move.from == source; });
}
// More than one move. Use the display lines (if we have them)
// to disambiguate; otherwise, we have no information.
- var move_hash = {};
- for (var i = 0; i < moves.length; ++i) {
+ let move_hash = {};
+ for (let i = 0; i < moves.length; ++i) {
move_hash[moves[i].san] = moves[i];
}
// See if we're already exploring some line.
if (current_display_line &&
current_display_move < current_display_line.pv.length - 1) {
- var first_move = current_display_line.pv[current_display_move + 1];
+ let first_move = current_display_line.pv[current_display_move + 1];
if (move_hash[first_move]) {
return move_hash[first_move];
}
}
// History and PV take priority over the display lines.
- for (var i = 0; i < 2; ++i) {
- var line = display_lines[i];
- var first_move = line.pv[line.start_display_move_num];
+ for (let i = 0; i < 2; ++i) {
+ let line = display_lines[i];
+ let first_move = line.pv[line.start_display_move_num];
if (move_hash[first_move]) {
return move_hash[first_move];
}
}
- var best_move = null;
- var best_move_score = null;
+ let best_move = null;
+ let best_move_score = null;
- for (var move in refutation_lines) {
- var line = refutation_lines[move];
+ for (let move in refutation_lines) {
+ let line = refutation_lines[move];
if (!line['score']) {
continue;
}
- var first_move = line['pv'][0];
+ let first_move = line['pv'][0];
if (move_hash[first_move]) {
- var score = compute_score_sort_key(line['score'], line['depth'], invert);
+ let score = compute_score_sort_key(line['score'], line['depth'], invert);
if (best_move_score === null || score > best_move_score) {
best_move = move_hash[first_move];
best_move_score = score;
return best_move;
}
-var onDrop = function(source, target) {
+let onDrop = function(source, target) {
if (source === target) {
if (recommended_move === null) {
return 'snapback';
}
// see if the move is legal
- var pseudogame = new Chess(display_fen);
- var move = pseudogame.move({
+ let pseudogame = new Chess(display_fen);
+ let move = pseudogame.move({
from: source,
to: target,
promotion: 'q' // NOTE: always promote to a queen for example simplicity
if (move === null) return 'snapback';
}
-var onSnapEnd = function(source, target) {
+let onSnapEnd = function(source, target) {
if (source === target && recommended_move !== null) {
source = recommended_move.from;
target = recommended_move.to;
}
recommended_move = null;
- var pseudogame = new Chess(display_fen);
- var move = pseudogame.move({
+ let pseudogame = new Chess(display_fen);
+ let move = pseudogame.move({
from: source,
to: target,
promotion: 'q' // NOTE: always promote to a queen for example simplicity
// Walk down the displayed lines until we find one that starts with
// this move, then select that. Note that this gives us a good priority
// order (history first, then PV, then multi-PV lines).
- for (var i = 0; i < display_lines.length; ++i) {
+ for (let i = 0; i < display_lines.length; ++i) {
if (i == 1 && current_display_line) {
// Do not choose PV if not on it.
continue;
}
- var line = display_lines[i];
+ let line = display_lines[i];
if (line.pv[line.start_display_move_num] === move.san) {
show_line(i, 0);
return;
}
// End of dragging-related code.
-var fmt_cp = function(v) {
+let fmt_cp = function(v) {
if (v === 0) {
return "0.00";
} else if (v > 0) {
}
}
-var format_short_score = function(score) {
+let format_short_score = function(score) {
if (!score) {
return "???";
}
if (score[0] === 'T' || score[0] === 't') {
- var ret = "TB\u00a0";
+ let ret = "TB\u00a0";
if (score[2]) { // Is a bound.
ret = score[2] + "\u00a0TB\u00a0";
}
return ret + "-" + Math.ceil(score[1] / 2);
}
} else if (score[0] === 'M' || score[0] === 'm') {
- var sign = (score[0] === 'm') ? '-' : '';
+ let sign = (score[0] === 'm') ? '-' : '';
if (score[2]) { // Is a bound.
return score[2] + "\u00a0M " + sign + score[1];
} else {
return null;
}
-var format_long_score = function(score) {
+let format_long_score = function(score) {
if (!score) {
return "???";
}
return null;
}
-var compute_plot_score = function(score) {
+let compute_plot_score = function(score) {
if (score[0] === 'M' || score[0] === 'T') {
return 500;
} else if (score[0] === 'm' || score[0] === 't') {
* @param {boolean=} depth_secondary_key
* @return {number}
*/
-var compute_score_sort_key = function(score, depth, invert, depth_secondary_key) {
- var s;
+let compute_score_sort_key = function(score, depth, invert, depth_secondary_key) {
+ let s;
if (!score) {
return -10000000;
}
/**
* @param {Object} game
*/
-var switch_backend = function(game) {
+let switch_backend = function(game) {
// Stop looking at historic data.
current_display_line = null;
current_display_move = null;
'bP': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22><path d=%22m 22.5,9 c -2.21,0 -4,1.79 -4,4 0,0.89 0.29,1.71 0.78,2.38 C 17.33,16.5 16,18.59 16,21 c 0,2.03 0.94,3.84 2.41,5.03 C 15.41,27.09 11,31.58 11,39.5 H 34 C 34,31.58 29.59,27.09 26.59,26.03 28.06,24.84 29,23.03 29,21 29,18.59 27.67,16.5 25.72,15.38 26.21,14.71 26.5,13.89 26.5,13 c 0,-2.21 -1.79,-4 -4,-4 z%22 style=%22opacity:1;fill:%23000000;fill-opacity:1;fill-rule:nonzero;stroke:%23000000;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22/></svg>',
};
-var svg_piece_theme = function(piece) {
+let svg_piece_theme = function(piece) {
return svg_pieces[piece];
}
-var init = function() {
+let init = function() {
unique = get_unique();
// Load settings from HTML5 local storage if available.
} else if (event.which == 37) { // Right arrow.
prev_move();
} else if (event.which >= 49 && event.which <= 57) { // 1-9.
- var num = event.which - 49;
+ let num = event.which - 49;
if (current_games && current_games.length >= num) {
switch_backend(current_games[num]);
}
projects / remoteglot / commitdiff